Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

Key Battery Replacement on Audi A4 and A5

Model: Audi A4 B9 - Years: 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024
Part: Key

See other generations:
Video tutorial

The battery to replace is a CR2032. You can easily find it at a hardware store or a large supermarket, as well as online, and it costs very little. Press the two side buttons to remove the key fob from its casing.

Then, remove the plastic cover underneath the head of the key fob, which was just covered by it. The battery is attached to this plastic, which you can now pull out to insert the new battery you purchased. As you can see, this is a very simple operation that anyone can do themselves.


Updated on 5 May 2026 by ScegliAuto


Related tutorials

How to Replace the Key Battery in an Audi A4
How to Replace the Key Battery in an Audi A4
Audi A4 (2014-2024 / B9) Start by pressing and holding the button located on the back of the key fob for your Audi A4 to extract the physical key. Once you have removed the p…
How to Replace the Key Fob Battery on an Audi A4?
How to Replace the Key Fob Battery on an Audi A4?
Audi A4 (2014-2024 / B9) To replace the key fob battery on an Audi A4, press the button on the top of the device to remove the key. Once the key is removed, you will find the…
How to Replace the Key Fob Battery for the Audi A4?
How to Replace the Key Fob Battery for the Audi A4?
Audi A4 (2014-2024 / B9) In this tutorial, you will see how to replace the key fob battery for the Audi A4, a very simple and quick operation. You will need a replacement bat…

How to Open the Fuel Filler Flap in the Hyundai i30?

In this tutorial, you will learn how to open the fuel filler flap in the Hyundai i30, a very simple operation that follows the typical procedure of most vehicles. First, unlock the locks using the designated button on the remote, then open the driver's door, locate the release lever on the left side of the seat, and operate it. Next, move to the fuel filler flap, open it completely, unscrew the cap, and refuel as needed. To close the flap, simply press it gently.

Watch the video!


by ScegliAuto

More videos